Electric switch.



L. F. LINDSTROM.

ELECTRIC SWITCH.

APPLICATION rum NOV.20,1912.

1,059,056, Patented Apr. 15, 1913.

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L. P. LIN'DSTROM. ELECTRIC SWITCH.

APPLICATION FILED NOV, 20, 1912 1 059 056. Patented Apr.15,1913.

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1101718 F. LINDSTROM, OF BRIDGEPORT, CONNECTICUT.

ELECTRIC SWITCH.

Application filed November 20. 1912. Serial No. 732,684.

To all whom it may concern.

Be itknown that I, Lows I. limos'rrgmr, asubjeet of the King of Sweden. residing at Bridgeport, in the county of Fairtield and State of Connecticut, have invented certain new and useful Improvements in Electric aches, of which the following is a speciion.

his invention comprehends certain new useful improe'ements in electric switches and andfrelates more particularly to switches for-electric lamp sockets.

The. primary object: of the invention resides in the provision of an electric lamp socket which shall be or" estren'iely simple ventiotrreferencc is to he had to the following dscri ition and accompanying drawings. inwhieh.

-Figure l side elevation of my improved socl-zet it'appears in use, Figs. 2 are eleratio of the socket, the metal casing being removed. F lis a vertical sectional View through In? imention, Fig.5

.s a -liforizontal sect'imial taken upon 1 ".-.'pl ane or line :"FJ' of l 4, the clutch raring removed. i, 7, 8, 9,10, 11 a'ro' detail views of parts to be here fully described. and. Fi 13 and 14 ian "l end views respectively, of one nipro i'ed binding posts. ring]; i: detait to the'tlrawings by erals l designates a metal cap and 2 a c-tal shell of the construction usually l and'which are used to house the iici'jllzflllFllll proper.

notes 11 preferably porcelain base npon its under with the projection land-upon its upper .ie with the A dish 6 of some non-conad relation- Specification of ietters Patent:

....al is h ld in porcelain haw s, by means of Patented Apr. 15, 1913.

the binding posts 7 and 8. Each of these binding posts is provided with the inwardly projecting end portions 9 and has its body portion bent to form the sleeve 10. Theupper end of each of the binding posts is apertured to receive a clamping screw 11 by means of which the wires may be attached. The projections 10 and the sleeve 10 form supports for the wire 11 and effectually 5 prevent shortcircuiting. The upper surface of the porcelainbase 4 has formed. therein, what may be termed a ratchet cominutator 12. I have shown this comn'iut-ator provided with four teeth. the outer faces of two of which are covered with the conducting strips 13 and. 14, while the others are non-conducting. 'lhe conducting strip 13 is provided adjacent one end with a lat.-

eral extension 15. which passes under the inwardly iirojecting end 9 of the binding post 8 and is clamped againstthe same and against the lmse l, by means of the screw 16, The other conducting strip 14 is similarly provided with a lateral extension 17, which is connected by means of a screw 18 to an inwardly projecting; flange it) formed upon the metallic socket. 20. It will thus be seen that this screw also assistsin securing the socket to the base 4.

A spindle 21 having one end longitudinally slotted and being n'ovided upon its other end with a many sided projection 1S seated atv its lower end within the recess formed in the. con'u'muator 12 and the other end of the spindle projects through an opening in the disk 6, said opening being countersunk around the extreme end portion of the spindle. The bottom of the re cess in the commutator is of the same shape. as the many sided projection and the spindle 21 is tl'ieretore held against rotation, but, by raising this iiindle a slight distanceso to bring the many sided pot-- ticn 22 into the larger portion of the recess, said spindle may be rotated.

A pair of segmental spring brushes 23 and 24 are formed integral with the connecting strip 25, which is enlarged intermediate its. ends and provided with the circular opening. 26. The brushes 23 and 24 extend in opposite directions from the connecting strip 25, which continues from the upper edges of these. brushes. The connecting strip 25 is clamped between two insulating disks 27 by means of the flanged sleeve 28 and mounted for revolution upon the spindle 21. The

flanged sleeve 28 may be rotated by means of a clutch member 29, which is "formed of a single piece of sheet-metal and which com prises a segmental body portion 30 rounded at one end and formed with the centrally positioned circular opening 31. One edge of the body portion .30 is provided with a number of slits and the alternate portions of metal formed by said slits are bent downwardly and outwardly to provide the guide fingers 32. The fingers 32 are slightly longer than the unbent projections 33. A downwardlv projecting stop 34 is formed upon one edge of the body portion 30 and is provided with a circular opening 35 which communicates with the end opening slot 36, the purpose of which will be hereinafter explained. A downwardly projecting 5 ur 37 is formed upon the clutch plate 29 or removable engagement in notches 39' formed in the flanged sleeve 28. An expansive spiral spring 38 has one end secured Within the slotted portion of the spindle 21 and is affixed at its other end to the clutch plate 29, whereby said plate is held against the flanged sleeve 28 and also heldagainst rotation in one direction.

In order to provide for actuating the clutch plate 29, I attach a pull chain 39 consisting of a number of beads threaded upon a wire, to the stop projection This at- .tachment is easily made by slipping a bead upon each side of the projection, the wire being received within the slot 36 and opening 35. The ortion of the chain adjacent the afiixed en thereof, is received between the projections 32 and 33 of the clutch plate 29. A chain guide 40 having a funneled body portion provided with hook-shaped pro ections or arms 41, is secured Within the brackets42 between the base 4 anddisk 6. It will be'seen upon reference to Fig. 9, that the brackets 42 are formed with arcuate slots-{for the reception of the hook-shaped projections 41. Stops 43 are also formed upon the chain guide 40 and abut the interior of the sheet-metal casing 2. The construction of the chain guide and the manner in which it is positioned, permits of a slight rotary movement which facilitates the passa e of the chain 39.

en the chain 39- is pulled, the clutch plate 29. is rotated about a quarter of a revolution' and carrieswith it' the flan ed sleeve 28, which in turn actuates the brus es 233and 24 causing them to either contact or lgreak their contact with the conducting strips 13 and 14, positioned upon the commutatorl2. When the chain is released the s iral .sprin 38 reverses the movement of t e clutch p ate 29 and carries the stop 34 against one end wall ofthe recess 5. In the reverse movement of th clutch plate, the

notched sleeve 28. When the parts are po itioned, as disclosed in Fig. 5 the circuit is broken but should the chain be pulled once the circuit, allowing the current to flow in 44, which is secured to the under side 0' the base 4, through the lam socket 20,- screw 18, thence from the con ucting strip 13 via the brushes to the conductingstrip 14 and then out through the binding post 8.

raising'the spindle 21, rotat-lng the same, and again seating it within the bottom of the recess formed within the commutator 12.

It is to be understood that while I have shown and described the .ment of my invent-ion, I limited tothis exact construction and ar-' rangement of parts, but may make such spirit of the invention.

I claim is 1. In a pull socket for electric lamps, the combination with the movable part of a pawl and ratchet circuit breaker, o 4 .part consisting of a segmental plate having its periphery ,formed with a plurality o slits, the alternate portions between saidslits -being bent pending the periphery of the clutch plate.

2. A binding post comprisinga-bod porbeing apertured for the .rece tion of fastening members,-a sleeve forme upon one side of the body portion adjacent one end thereof, spaced lateral projections formed adjacent the other end of said body portion, and a clamping screw threaded through said post for the purpose of 'retainin 'awire projections and s eeve.

3. A binding post having'a sleeve formed adjacent -one end jections formed adjacent the other end there threaded opening, and a clampin threadedwithin said opening for t e purpose of holding a wire, said wire be ng looped around the screw and passing tially as described.

In testimony whereof I atlix my signature in presence of'two witnesses.

LOUIS F. LINDSTROM.

\Vitnesses: k

' AsMUs Pnrurrssn,

Eanas'r FFLABOCZLEY.

spur 37 automatically disengages from the the brushes will move so as to overlap the conducting strips 13 and 14, which will close through the binding post 7, the contact late The spring 38 may be readily tightened by Y preferred embo'di- 0 not wish to be changes as will fall within the scope and Having thus described my invention, what v an operating downwardly and outwardly, whereby a chain guide is formed, and a deapertured stop also formed upontion having angularly bent ends,-sai ends thereon, the wire assing through the lateral thereof and lateral proof, said binding post being provided with a screw through said projections and sleeve, substan- 

